Hi-my son loves to mess about with computers, which I encourage-however he has deleted all user accounts except one account (he said he was trying to free up memory), which is named Guest and has (so it says) administrator rights. PC works fine but I now want to add a new wireless printer but it says I need administrator rights! I am the only user and the profile has administrator status.

Anyway-tried to add new user and get message 'The specified account names is not valid, because account names cannot contain the following characters ^[]":;|<>+=,?*'

After doing some google searches have tried many times to add another user via the CMD prompt, but I always get 'System 5 error, access denied' even when I run as administrator, with UAC disabled.

Am I stuffed or is there a solution-which I can't seem to find on the net.

Help!