I went on vacation and brought my windows 7 laptop. I start playing metal gear rising and binding of isaac rebirth, first it starts of a bit laggy but otherwise fine. Then the the madness begins. Later when playing, the lag is gone but then later SOMETIMES it speeds up. Then it gets worse and worse. Which now its fast almost all the time. For some reason its happening on my laptop but I never got this on my windows 8. Thanks in advance.What make/model of laptop so we can check into specs?
Model is HP Pavilion dv7 Notebook PC
Processor is AMD turion (tm) x2 dual core mobile m520
It has 4 GB ram and it's 64 bit
Minimum Specs for game:

CPU: 2.4 GHz Intel Core 2 Quad or AMD Phenom X4 or better.

It looks like your GPU might be borderline for it under minimum specs, but the CPU requirement calls for a 4 core CPU and you only have 2 cores.

Quote

Minimum:

•CPU: 2.4 GHz Intel Core 2 Quad or AMD Phenom X4 or better
•RAM: 1 GB system memory
•Graphics: DX 10 card with 512 MB RAM, Nvidia 8000-series or Radeon 3000-series or better.
•Operating system: Windows Vista
•DirectX audio card
•16 GB hard DISK space




Recommended:

•CPU: 3 GHz quad core processor, Intel Core i5, i7, or AMD FX 8000-series
•RAM: 2GB system memory (4 GB for 64 bit OS)
•Graphics: DX 11 card with 1 GB RAM, Nvidia 500 series or AMD 6000 series or better.
•Operating system: Windows 7
•DirectX audio card
•16 GB hard disk space