Sure, but not to pay taxes. Your aerospace tax service company will install it for you. Usually in the tax office building. You have already spent money to buy the original system. Reinstallation is free, but you have to pay 400 yuan service fee every year. They will inform you when necessary.

If you want to do a good job, you must sharpen your tools first. If you don't change the CPU and motherboard, just adding a memory won't be much faster. Financial personnel need a good computer.