I/O Device Error

The Windows error "I/O Device Error" means there is an error in the computer's ability to read data when you try to install a program or to copy data from your CD or DVD drive.

This issue is likely to occur when Windows tries to use a transfer mode that your CD drive cannot use or does not recognize. To resolve this issue, you will need to change the transfer mode in your IDE channel properties.

Steps To Change IDE Properties

1. Click the Start button
2. Right click My Computer
3. Select Manage from the resulting menu
4. In the Computer Management window, select Device Manager
5. In the right pane, click to expand IDE ATA/ATAPI controllers
6. Identify your CD/DVD drive in the expanded menu and right click the appropriate drive
7. Select Properties
8. In the Properties windows, click the Advanced Settings tab
9. In the Transfer Mode box that represents your CD/DVD drive (typically Device 1); open the dropdown menu and select PIO Only
10. Click ok and exit all windows

If this does not resolve your issue, then you will need to go back using the above procedure and change the Device 1 in step #9 back to "DMA if available". Then, change Device 0 to "PIO Only" in the Transfer Mode box.

For reference, the Device 0 is the Primary IDE Channel and the Device 1 is the secondary IDE Channel.

After you change your settings, make sure you restart your system so that the computer recognizes the changes you have made. After you reboot, check the settings to make sure they are in effect. If they are, your device should now work properly.

Enable downloads blocked by Security Zone Policy - Windows

This issue does not occur in Firefox 2 or below.
Starting in Firefox 3, downloads of executable files (e.g., .exe or .msi) may fail and the Firefox Downloads window may contain this message, under the filename:
This download has been blocked by your Security Zone Policy -

This issue occurs because Firefox now honors your Windows security settings for downloading applications and other potentially unsafe files from the Internet.

You can resolve this issue as follows:

Bypass Windows Security Policy check

Starting in Firefox 3.0.6 you can use about:config to manually add the new Boolean preference, browser.download.manager.skipWinSecurityPolicyChecks and set it to true. This will bypass the Security Zone Policy check. 

List of file hosting servers

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117 Run commands in Windows XP

Run command is very useful, but sometimes it is forgotten. Use it sometimes and you will find how powerful is run command.

1. Accessibility Controls - access.cpl ,                                    2. Accessibility Wizard - accwiz,

3.Add Hardware Wizard - hdwwiz.cpl,                                 4.Add/Remove Programs - appwiz.cpl,

5.Administrative Tools - control admintools,                         6.Bluetooth Transfer Wizard - fsquirt,

7.Calculator - calc,                                                                  8.Certificate Manager - certmgr.msc,

9.Character Map - charmap,                                                    10.Check Disk Utility - chkdsk,

11.Clipboard Viewer - clipbrd,                                               12.Command Prompt - cmd,

13.Component Services - dcomcnfg,                                      14.Computer Management - compmgmt.msc,

15.Control Panel - control,                                                      16.Date and Time Properties - timedate.cpl,

17.DDE Shares - ddeshare,                                                    18.Device Manager - devmgmt.msc,

19.Direct X Troubleshooter - dxdiag,                                     20.Disk Cleanup Utility - cleanmgr,

21.Disk Defragment - dfrg.msc,                                             22.Disk Management - diskmgmt.msc,

23.Disk Partition Manager - diskpart,                                     24.Display Properties - control desktop,

25.Display Properties - desk.cpl,                                            26.Dr. Watson System Troubleshooting Utility - drwtsn32,

27.Driver Verifier Utility - verifier,                                        28.Event Viewer - eventvwr.msc,

29.Files and Settings Transfer Tool - migwiz,                        30.File Signature Verification Tool - sigverif,

31.Findfast - findfast.cpl,                                                       32.Firefox - firefox,

33.Folders Properties - control folders,                                  34.Fonts - control fonts,

35.Fonts Folder - fonts,                                                          36.Free Cell Card Game - freecell,

37.Game Controllers - joy.cpl,                                                38.Group Policy Editor (for xp professional) - gpedit.msc,

39.Hearts Card Game - mshearts,                                           40.Help and Support - helpctr,

41.HyperTerminal - hypertrm,                                                42.Iexpress Wizard - iexpress,

43.Indexing Service - ciadv.msc,                                            44.Internet Connection Wizard - icwconn1,

45.Internet Explorer - iexplore,                                               46.Internet Properties - inetcpl.cpl,

47.Keyboard Properties - control keyboard,                           48.Local Security Settings - secpol.msc,

49.Local Users and Groups - lusrmgr.msc,                             50.Logs You Out Of Windows - logoff,

51.Malicious Software Removal Tool - mrt,                           52.Microsoft Chat - winchat,

53.Microsoft Movie Maker - moviemk,                                  54.Microsoft Paint - mspaint,

55.Microsoft Syncronization Tool - mobsync,                        56.Minesweeper Game - winmine,

57.Mouse Properties - control mouse,                         58.Mouse Properties - main.cpl,

59.Netmeeting - conf,                                                             60.Network Connections - control netconnections,

61.Network Connections - ncpa.cpl,                                      62.Network Setup Wizard - netsetup.cpl,

63.Notepad - notepad,                                                                        64.Object Packager - packager,

65.ODBC Data Source Administrator - odbccp32.cpl,          66.On Screen Keyboard - osk,

67.Outlook Express - msimn,                                                  68.Paint - pbrush,

69.Password Properties - password.cpl,                                 70.Performance Monitor - perfmon.msc,

71.Performance Monitor - perfmon,                                       72.Phone and Modem Options - telephon.cpl,

73.Phone Dialer - dialer,                                                         74.Pinball Game - pinball,

75.Power Configuration - powercfg.cpl,                                76.Printers and Faxes - control printers,

77.Printers Folder - printers,                                                   78.Regional Settings - intl.cpl,

79.Registry Editor - regedit,                                                   80.Registry Editor - regedit32,

81.Remote Access Phonebook - rasphone,                             82.Remote Desktop - mstsc,

83.Removable Storage - ntmsmgr.msc,                                  84.Removable Storage Operator Requests - ntmsoprq.msc,

85.Resultant Set of Policy (for xp professional) - rsop.msc,  86.Scanners and Cameras - sticpl.cpl,

87.Scheduled Tasks - control schedtasks,                              88.Security Center - wscui.cpl,

89.Services - services.msc,                                                      90.Shared Folders - fsmgmt.msc,

91.Shuts Down Windows - shutdown,                                  92.Sounds and Audio - mmsys.cpl,

93.Spider Solitare Card Game - spider,                                  94.SQL Client Configuration - cliconfg,

95.System Configuration Editor - sysedit,                             96.System Configuration Utility - msconfig,

97.System Information - msinfo32,                                        98.System Properties - sysdm.cpl,

99.Task Manager - taskmgr,                                                    100.TCP Tester - tcptest,

101.Telnet Client - telnet,                                                       102.User Account Management - nusrmgr.cpl,

103.Utility Manager - utilman,                                               104.Windows Address Book - wab,

105.Windows Address Book Import Utility - wabmig,         106.Windows Explorer - explorer,

107.Windows Firewall - firewall.cpl,                                     108.Windows Magnifier - magnify,

109.Windows Management Infrastructure - wmimgmt.msc, 110.Windows Media Player - wmplayer,

111.Windows Messenger - msmsgs,                                       112.Windows System Security Tool - syskey,

113.Windows Update Launches - wupdmgr,                         114.Windows Version - winver,

115.Windows XP Tour Wizard - tourstart,                            116.Wordpad - write

117.Automatic Updates - wuaucpl.cpl,

Windows Management Instrumentation Service not available in windows services.

This happens if the operating system is not installed properly or “winmgmt.exe, winmgmtr.dll & wmi.mfl” is missing or these files are damaged due to number of reasons.

Resolution
•    Copy the winmgmt.exe, winmgmtr.dll & wmi.mfl from any PC with same operating system (with its service pack) and paste it in “C:\Windows\System32\Wbem”

•    Now type the following command in CMD.
o    Winmgmt/kill                (To kill any windows management based application that is running)
o    Winmgmt/clearadap     (To clear the windows management adapter settings)
o    Winmgmt/unregserver  (To un-register the windows management components)
o    Winmgmt/regserver     (To register the windows management components)

•    Now, open services.msc and start the service that is added.