Run the Adobe Flashplayer uninstaller once more.http://secunia.com/software_inspector/
Allow Secunia to scan your computer for all instances of flash.
Put a check in the box next to:
"Enable thorough system inspection.
Enable the Secunia Software Inspector to search for software installed in non-default locations"
Secunia will give you the file paths to where flash is located. Migrate to each instance and delete. The deleted files should now be in your recycle bin. Leave them there until you are sure you have not accidentally deleted another file.
After doing the above, go to Windows live OneCare and run the free scan. This will clean the registry among other things. Run the full service scan.http://onecare.live.com/site/en-us/default.htm
Reinstall Adobe flashhttp://www.adobe.com/products/flashplayer/
You have not mentioned what OS and browser you are using. I am assuming Windows XP2 and IE7 and that you are the Administrator. Is that correct? If after doing the above you still cannot use flash, I would suggest installing Firefox 2 with the Flashplayer plugin for Firefox.