I temporarily disabled Bit Defender anti virus to install CorelDraw X5 but never the less was unsuccessful. After that I enabled it. However Iolo's System Mechanic now does not work it opens but does not connect to the internet. I uninstaled and reinstalled it but to no effect. I also uninstalled and reinstalled Bit Defender Internet Suite but to no effect. I have put System Mechanic in the Bit Defender's anti virus exlusion list. But in its white list [the trusted programs] System Mechanic is not there. I o not know how to put it into the trusted program white list. Corel Draw X5 was later installed into an another computer of mine but even after the reinstallation of Bit Defender on this computer Coreldraw X5 freezes at the Eula Agreement. I ran sfc /scannow and there was no problem. Could some expert shed light on this situation. I have Windows Seven Ultimate.