[qwertz]

windows xp pro
800mhz
amd-duron
not know more info
first everything on the desktop dissappeared
then i could not login wether in normal safe mode or last known good configuration without choose any of shutdown reboot standby or hibernate with the login together.when i login the the next message is in the login screen is preparing to logoff LOL desperate can i remove the login in bios?

[evilfantasy]

Download HijackThis to your desktop.
Double-click on the file you just downloaded.
Click on the "Install" button to install.
It will by default install to the directory - C:\Program Files\Trend Micro\HijackThis
Please do not change the default install location.
Upon install, HijackThis should open for you.

Next click on the "Do a system scan and save a log file" button.
HijackThis will scan and then a log will open in notepad.
In the top left of the notepad window click "File" > "Save As" name it hijackthis and then save it to the Desktop.
Please save the log as a text (.txt) file or .log
Do NOT attach MS-Word .DOC files, they will NOT be looked at!
In your post, add the log as an Attachment.
* Don't have Hijackthis fix anything yet. Most of what it finds will be harmless or even required.
** Don't use the Analyse This button. It's findings are dangerous if misinterpreted.

Guide for attaching logs to a post

[qwertz]

how should i use highjackthis as i wrote i can not enter windows?

[evilfantasy]

Can you boot in safe mode?

Do you have your Windows XP CD?