Depends what you mean disconnects. If you get a alert that you have lost network connectivity on your wireless that is a far different problem than if you just get hung for a bit or if your VPN tunnel drops to your work. The first you may be able to fix by doing things like replacing the router the second ones are more than likely a issue outside your house and tough to get someone to fix.
First thing to always try, and since you sit near the router the method I would always use, is to use a ethernet cable to the router. This will show if it is a wireless issue. Next would be to bypass the router and plug directly to the ISP modem,not sure if that is a option since the model router you list seems to not be valid.
You see this question all the time here. Seems there is this problem with just about every router. You can never tell since it is related to which pc nic also.
Pretty standard things to try, patch the firmware on the router and the pc nic. Since it does not happen on your personal pc I would be trying a $10 USB nic card before I replaced the router.
I currently have a Belkin3ACB which has been mostly fine for my home laptop. However, I have been gradually teleworking at home and have been noticing that my work computer disconnects far more often. This is despite the fact that I work right next to the router as oppsed to in another room like I do wiht my personal laptop. I suspect the reason is due to using far more bandwidth on my work computer. Is there something to that theory and if so, how do I choose a more reliable router/modem?