I am NEW to this. I only had 6mb on my pc so I decided to defrag. As it turns out, my pc was already set to defrag on a weekly basis. Then I got the bright idea to compress computer. I compressed my whole computer and now some proprietary software does not work. One of my ex-developers had the suggestion to delete the databse from SQL 2005 and then when I RESTARTED my siftware it coule reinstall it. Unfortunately because it was decompressed I couldn't open the database either to even delete it.
Is there any easy WAY (for a non computer programmer like myself) to reverse my compressed computer and put it BACK to how it was a few days ago?

Thanks for any help anyone has.

ps - right CLICK>decompress or unzip using 7zip was not an option I had available to meI truly have no idea what you could mean when you say "compress". You could mean NTFS compression, Windows Drivespace... or heaven forbid you rightclicked on your C: drive and sent it to a compressed folder or something...What software did you use to "compress" your computer?