When I activate the "guest" account, all that appears is a "Security Center" showing problems, etc., and a request to purchase hte "antidote." I cannot access the guest account and can only deactivate it, rendering it useless all of the time. How do I get rid of this? Thanks to anyone who can help.1 person needs an answerI do too

First of all, you should leave the Guest account which you find in Control Panel>User Accounts alone. It is a system account and not one meant for when you are feeling hospitable. It is disabled by default in Windows XP, Vista, Windows 7, Linux, Unix, and OS X for a reason. Secondly, the "request to purchase the antidote" makes me think your computer is infected with "Security Center", which is one of many of the rogue security programs. It is called "rogue" because it pretends to be A Good Guy but is really Evil. Do not pay them! Look for removal steps here Bleeping Computer removal how-to's - http://www.bleepingcomputer.com/forums/forum55.html or here - Malwarebytes malware removal guides - http://tinyurl.com/5xrpft Malwarebytes' Anti-malware (MBAM) or SuperAntiSpyware will often do the job. Both have free versions and you do not need to purchase these programs. These may work for you and all may be well. However, in many cases the computer will also be infected with other trojans and protected by a rootkit. These machines are extremely difficult to clean. If your machine is one of these cases, either get guided help at one of the specialty forums listed at the link below OR take your machine to a local computer professional OR back up your data and do a clean install of Windows. It is your choice. I don't recommend using BigComputerStore/GeekSquad types of places. http://www.elephantboycomputers.com/page2.html#HJT-links MS-MVP - Elephant Boy Computers - Don't Panic!