Satellite Pro R50-B-123 Trackpad, Cursor goes missing

Hello, Need Help on following
1. Cursor goes missing and track pad doesn't work at all. It comes on its own after few hours. Don't know how to handle this. Tried FN+F5 but no use, even re started the laptop doesn't work.
2. Lot of Ads, Malware whenever I watch movie or play Online game. Speed very slow because of this. Pl let me know how to improve the performance & get rid of this
Thanks in advance for helping out
Sid