Power Supply Rattling Issue

Nah, I left the CPUs sit for a while before putting them back on, and the glue is still there on both computers. I took them off the last time I cleaned the computers, too, which was over a month ago.

As for the switch, we may just have Windy City Computers do it. My mom doesn't seem to be sure how to remove and add the glue, and I have no clue.

 

You really shouldn't ever clean thermal paste off of anything without using rubbing alcohol and a microfiber cloth or something else that won't leave lint or any other sort of residual fibers, and you should also never separate the heatsink from the CPU unless you intend to wipe and reapply new thermal paste afterwards. That being said, you probably will see no difference or encounter any error if you just took them apart and put them back together without doing so, unless you're doing extreme overclocking and/or your CPU rises above the manufacturer's recommended temperature cap.

If you have thermal paste available, it's actually quite simple to apply. My advice would be to add a bit onto the actual processor, about the size of a grain of rice, and with your finger inside of a plastic bag or maybe some seran wrap, gently smooth the paste out over the entirety of the CPU surface (the flat surface, not the pins). Lock the processor in, and then attach the heatsink with as little movement as possible after the actual paste comes into contact with the heatsink.

As for the concern this thread was primarily addressing, it's most likely not a big deal that your fan is rattling slightly. The only real problem it might cause is annoyance to you. A replacement would probably be optimal, but is most likely not of dire importance that it be replaced as soon as possible. If you don't have the money or time to do it right away, don't worry about it. Just know that if you take it to 'professionals' to check and potentially order you a replacement, you're probably going to be charged hundreds of dollars more than you'd spend if you just ordered a new heatsink fan off of Newegg. I/we can help you find the replacement you need for only a few dollars, so you might want to consider that before you take it to a shop.