I suggest,
Running a virus-check on your system. www.Commandcom.com has an on-demand virus link if you don't have updated virus definitions.
Uninstall any new programs you installed just before the problem occurred.
Contacting the manufacturers web site and see if their system patches or downloads may address one of your problems -- you may want to update all your drivers and cmos anyway.
Unless you are worried about voiding a warranty, you can open the box and make sure all connections are properly seated. You would be surprised how many "become loose" with no human intervention.
Hope this helps.