Edited by: KingsGambit on 27/11/2009 19:42:39
Do you know the login details for an administrator account on that PC? If so, you can log off your current user acc, log in as admin and either install flash or change your own user acc to be an admin acc (Start -> Control Panel -> User Accounts -> User Accounts -> Manage Accounts. Select account to modify and choose change the account type, change it to admin).
You can also, as administrator, disable User Access Control. Click Start -> Run -> Type 'msconfig' (without speech marks) and hit enter. Select tools tab, and you'll see and entry for "Change UAC Setting".
You can download the flash 10 standalone installer from here
in case you're having trouble running it via Adobe's ActiveX malarky. Make sure your web browser is closed first.
It really isn't that hard, you could have probably googled these solutions as fast as it took you to write this whine. Everyone has tech troubles, doesn't matter what OS you use. This one is particularly simple to fix. If you don't have the login details for an admin acc however, I would say you may well be in trouble, but I'd blame the user for not noting down the login details. Microsoft can only hold your hand so much...
EDIT: Just noticed your post that it's a work PC. Go talk to your network admin, I'm sure he'll be happy to help you browse youtube at your desk. Are you one of those users that calls support to say your printer isn't working when there's been a power cut to the building? *sigh*