i have windows 7 64 bit and have problems with some computer programs such as website blocker v1.4 want let me install it. so the choice is up to you.
Windows 7 64 bit is NOT faster than 32 bit. It supports more RAM, and that would make your computer faster. But usually, only servers use 64 bit.
Win7 64 bit is faster and safer than 32 bit. To install 64 bit Win7, you need 64 bit driver and at least 4GB RAM for your computer.
Go for 64 bit for maximum performance and speed, but if you are ok with 32bit which accepts about 3gb's of ram then 32bit will do ok.