acp6ahmed :
Hey do you upgraded your cpu?
ive the same model...
I upgraded my VPCEH1L8E from the i3-2310m to the i7-2720QM. I did not have any problems with BIOS or with overheating. Of course it runs warmer than the i3 and the temperatures are a lot more volatile but that is expected as it is more powerful than the i3. Core temperatures at idle fluctuate between 30-50 degrees celsius. I would say the higher temps at idle have probably been when it has been performing windows update in the background. If you're in a very cold environment it might drop down to the twenties. On full load it can get up to 90 degrees celsius in a warm environment which infringes on cooling like having it on your lap. I have yet to use it through the Summer so I couldn't comment on how toasty it gets then.
I imagine idle temperatures would ideally be more stable around 20-30 degrees celsius and they could be if you minimised the amount of background processes running. At this moment I have two tabs open on firefox, hw monitor and the mail app open using battery power and core temperatures are in the low to mid 30s.
If you're using this laptop on a hard surface and you don't live in an environment where it is over 30 degrees celsius for the majority of the year you will not experience heat related deficiencies. Even then you'd have to be overloading it regularly which would cause most other laptops to suffer.
Before installing the CPU I would thoroughly clean the panasonic cooling fan of any dust. I used Arctic MX-4 thermal paste when reinstalling the new CPU.
I also upgraded my VPCEH1L8E with 8GB Corsair DDR3L Ram and a WD BLUE SSD. Performance is great.