Frustrated with my HP

Hello Tech Guys;
I here begging for help again. Last time you helped me out I had an emachines computer. It eventually crashed so I purchased this HP. I also switched to AT&T Uverse with wifi. I play some games on Facebook and they are constantly adding new areas that use alot of Ram. Because of this I maxed out my ram on this machine and increased my Mbs of service with AT&T. I had an infection and a friend convinced me to take it to a shop. Paid out some money and now again I'm having trouble. Not sure if I clicked something I shouldn't have or if my son may have, but now it is running slow with reboot problems. can you please help? I recently installed Synantec and also purchased Malwarebytes

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Pentium(R) CPU G630 @ 2.70GHz, Intel64 Family 6 Model 42 Stepping 7
Processor Count: 2
RAM: 8096 Mb
Graphics Card: Intel(R) HD Graphics, -1988 Mb
Hard Drives: C: Total - 936545 MB, Free - 870120 MB; D: Total - 17220 MB, Free - 2151 MB;
Motherboard: Foxconn, 2ABF
Antivirus: Symantec Endpoint Protection, Updated and Enabled