Computer Only Works In Safe Mode With Networking

I recently got a few notifications of viruses on my computer. Along with it came a lot of adware pop-ups. I downloaded Kaspersky AV 7.0 from their site and am using it as a trial version. I had an older version of McAfee, but hadn't renewed and do not have up-to-date virus definitions. As the title reads, my computer will only work when I boot windows in safe mode with networking. When I try to boot it up regularly, it goes very slow at the log-in screen and then once I log in, there's only a black screen with the mouse pointer. I left it at that window for a few hours hoping it would eventually load. Not the case. Same thing happens when I boot in safe mode with the exception that ctrl+alt+del works and will bring up the Windows Task Manager and then I can run/terminate programs from there. But no start toolbar or icons or anything else. I have done several full scans and they come up with viruses every time.