CAMTASIA 4 ERROR RESTART

it's surely a virus attack. Make sure u have a very good antivirus like kaspersky and update it and scan the computer.First,backup all ur important data at the earliest possible to a external pen drive.May be u can download kaspersky on torrentz.com.
If u are using internet and doing some important project works and loading data to ur pc from external devices, we always recommend kaspersky 6 or 7.In fact, it is the best antivirus existing on the planet till today.But, once u install it, make sure u turn off proactive defence and anti hacker features in kaspersky's settings, so that it does not notify u for every program that u use.

THANK YOU!!!