Windows7 frequent crash solution

My notebook runs Windows XP Good, since the installation of Windows7, often irregular crashes, especially when browsing the web, occasionally crashes. Symptoms: The mouse does not move, the keyboard except the brightness adjustment under Fn, all others are invalid. When the screen cover is closed, the screen is lit and not closed. The system is genuine version, full installation mode, pure system, except for WIN7 comes with no third-party anti-virus software, only installed OFFICE2003 factory notebook comes with the program, no other software is installed.
Processing:
1. Try to disable ACPI in the BIOS settings. I can't find this item in my machine after entering the BIOS.
2. Upgrade the BIOS to the latest version, it will still crash.
3. BIOS is the default setting, the memory works as the default operating frequency of 800MHz, brand memory, there should be no problem.
4. I think that IE browser is not compatible with hardware, use google browser, or occasionally crash.
A friend said that the same machine as me, the same system, does not crash. After careful analysis, it should be caused by poor hardware contact, resulting in large contact resistance, and the signal transmission is not smooth, resulting in conflicts. In XP and Windows7 memory management mechanism is not the same, WIN7 memory requirements are relatively high, it is estimated to be a memory problem.
CPU welding on the motherboard, it should not be bad contact, only the wireless network card, memory is inserted in the machine, remove the memory with an eraser and then rub the gold finger to install, although the golden finger is good and clean.
After this, the problem of the crash is solved.
If you have such a phenomenon, you may wish to clean the memory of the golden finger. If it is invalid, consider whether the fingers of the memory slot should be cleaned. The memory slot is not clean, you can use a suitable Dong to scrape it and look at it with a brush. It is common sense to pay attention to power-off operations.