Random Freezes NO BSOD

[Sash]

Hi,

my Laptop is freezing at seemingly random times. Not only when playing games, but also when browsing the web.
It is an Acer Aspire V5-573G. I bought it without OS. I installed Windows 7 Professional 64 bit, but couldn´t find a lot of drivers, since Acer is only supporting Windows 8 on this machine.
I downloaded some drivers from similar Acer-Laptops which was the suggested way to do in some forums.
Right now I don´t know, what causes these freezes and I unfortuanately do not get any BSOD to get some informations.
I tried using the EventLog but the only critical error I found was "The system has rebooted without cleanly shutting down first." which is caused, since I need to make a hard reset all the time Windows freezes.

If you need any more information please let me know. I appreciate the help.

Thanks,
Sascha

 

[Sash]

Update

I remembered, that sometimes (at some very rare moments) there actually was a BSOD. But I couldn`t read it because it was distorted.

Hope that helps a little bit.