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XP x64 install has problems logging on

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Hi all,

I have been using Windows XP x64 trial on my main PC for a while now (6 month trial, around 2 left when I purchase it). My computer has been fine and solid for such a long time, and I often leave it downloading Linux Torrents via my Bittorrent client. My PC had been on for around 5 days, during this time I installed a few programs which required restarts. I on each chose the option "manually restart later". Today, the 5th, possibly 6th day running, I decided to run one of the installed progems and knew I had to reboot my PC to do so. I rebooted my PC and it loaded up fine, and I was prompted my username and password (by my win 2003 style logon). I logged on and nothing loaded. My background loaded, and I was able to move my cursor but I had no taskbar.

After a few minutes I decided to leave it for a while and came back to it about 10 minutes later, I knew this was strange as from logon my PC usually loads in seconds. I C+A+D into Taskmanager and chose the "processes" tab, I couldn't see "explorer.exe" running. I then opened the applications tab, click new task and typed "explorer.exe" to get the error "explorer.exe is not a valid win32 application". I rebooted the PC and explorer.exe was not running and I got the same error when I tried again.

I was able to get system restore up by using the task manager and I set it to restore to one week ago. When my computer rebooted I still had problems logging on. A while ago, when I was on this forum one person had a problem with his XP install and somebody gave him a command to type in on start > run. When he ran this command it asked for his XP CD and then it fixed any missing or corrupt files from the CD. I would like to give that a go and it would be most appreciated if somebody could tell me this command or help me fix my problem.

Thanks (and sorry for the long explaination),

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    The Leather Lady

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Start > Run > cmd
sfc /scannow (note the space!)
You will be prompted to insert your XP CD.

sfc - system file checker, retrieves the correct version of the file from %Systemroot%\System32\Dllcache or the Windows installation source files, and then replaces the incorrect file.

If you want to see what was replaced, right click My Computer > manage, expand event viewer > system.

System File Checker (sfc)
Scans and verifies the versions of all protected system files after you restart your computer.
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