Using basic Gateway machine about two years old, W7. About a week ago, developed some problem between chrome and K9. Ended up deleting Chrome, and reinstalling. Worked for a day. Ended up deleting Chrome and using Firefox. Worked for a day or two. All along, the problems were mostly freezing while online and then dead, not even three finger salute. Now, I can't do system restore, says I need to shut antivirus, which I do, but it still doesn't work, no matter which restore point I try I get the same message. Now, it freezes almost immediately after a hard reboot. Ran Defrag, CCleaner and Malwarebytes. Got blue screen of death twice. Machine ran the "dirty" clean once on its own. Software, hardware? Is this what I get for buying a $300 computer? Thanks much.