I turn on my computer and after it shows the black screen with the Windows logo the screen goes black and there is a little window titled Isass.exe Bad Image that says The application or DLL C:\WINDOWS\system 32\DNSAP1.dll is not a valid Windows image. Please check against your installation diskette. I click okay and it's just a black screen and won't get to my desk top. What do I do? I've had other situations like this, where I could not get into Windows. The other times it would happen, it wouldn't get as far as the Windows screen and there was no message in a pop up window like this...just a black screen. I've used the installation disk to repair and rebuild before. Is this a similar thing? Please, if you could give me instruction on how fix the proplem, I'd really appreaciate it. Thank you. Janenab

you have sasser virus. use the search function to find links to removal tools. This is old news and has been answered many times.

Janenab: try; 1. boot in Safe Mode (F8) and rename DNSAP1.dll as DNSAP1.old check in case the 1 is an I try a normal boot. 2. boot in Safe Mode and select "Last Known Good Configuration", or 3. boot in Safe Mode and select Command Prompt and do a System Restore as detailed at: http://support.microsoft.com/?kbid=304449 let us know what worked for you...