I am getting annoyed.

I'm running a refurbished LAPTOP that i bought from a guy whose business is refurbishing and restoring computers and laptops ALIKE. I got it for a good price after giving him my old laptop... I'm starting to regret this to an extent.

My main problem is this:

Anytime i begin streaming videos from youtube, downloading torrents or playing League of legends, my computer will randomly lock up. Audio stalls, the mouse wont move. the computer is basically USELESS. I can wait anywhere from 15 seconds to 15 minutes for this lock up to resolve itself... which it does and it seem like the internet reconnects. Then it runs perfectly until the next freeze.

I'm running WIN7 ultimate
the network card is an Atheros AR5B93 WIFI adapter.
(the lan adapter is a Broadcom net link gigabit ethranet
Processor: AMD V120 Processor 2.20 hz
3 gb of RAM
Disk drive: Toshiba Mk2555gsx ata device

If ANYONE has any advice... it would be really appreciated.

Just a side note, I've reset my Ip address, I've installed latest drivers, I've done everything i and the internet seems to have thought of. I'm beginning to thing its the card itself.

CoorsHave you checked the system temperature?

If it was somehow refurbished by someone other than the manufacturer, there's the possibility something was done wrong (like forgetting to hookup the fan or not applying the heat sink correctly).Before opening laptop which could void any warranty, I'd check with the guy you bought it from and report the issue. Maybe he will work with you to resolve this. If you want to troubleshoot it yourself you can try SUGGESTIONS below that dont require opening laptop.

It could be Temperature, RAM, or Hard Drive .... from problems like this that I have diagnosed in the past. 99% of the fans out there in laptops have tachs on them and the system will shutdown if it detects no movement of the fan to protect itself. quaxo is correct that it can be temp related such as lack of thermal compound between CPU/GPU and heatsink etc.

If the hard drive LED is flickering or constantly on during the lock up, I'd suspect there is a issue with the hard drive possibly. System event logs usually list read/write issues. If the lock up is happening when reading/writing to swap space ( area of the hard drive that acts like virtual memory ) your pointer can lock up during the process.

Memtest86 can be run on it to verify that the memory works well for all addresses for the entire range of available memory. ( Seen some problems before where computers run fine and fast when not much is running, but then you multitask and address/access an upper part of your RAM count and then lock ups occur such as a Pentium 4 with 2 x 512MB sticks once and a memory issue when addressing memory in the 700MB region. Memtest86 pointed this out in RED, REPLACED RAM stick and problem solved. )

Speedfan works good for looking at hardware temperatures. Most hardware can be read and information displayed on temps as well as RPM's of fans etc.

All this can be diagnosed without opening the laptop and using software free on the web. Memtest86 needs to be burned to a CD or made into a bootable thumb drive.

I am hoping that the guy you bought it from has a 30 day warranty at minimum. I use to rebuild and sell refurbs and I gave 30 day warranty as long as people didnt open the computers. If they opened the case the warranty was void. I'd place a security seal between the cover and case that if broken I'd know its been tampered with and a small drop of nail polish on the corner of screws on laptops that if removed/signs of tampering, I would not be liable for any issues.

I had to do this when computers were more expensive 10 years ago and a customers son decided to try to perform a video card upgrade and "Forced" a wrong 8x AGP GeForce video card into a 2x AGP slot unintended for that AGP video card, which is keyed by design to try to keep wrong cards out and the force exerted to try to get that wrong card in there split the AGP connector and power was applied and the kid destroyed/smoked the motherboard. I could have said only an idiot would have forced with that much force a wrong video card into the AGP slot of the motherboard, but I bit my tongue and I decided to eat 50% of the cost of new motherboard and immediately started to tamper seal systems.