There're a whole lot of things that could cause this. Certainly a whole bunch of things running concurrently could be one that could be easily remedied at no cost. Adding another 4 GB of RAM is another that would cost in the $50 to $100 range depending. Errors on the hard drive or other components of your system could be a third possibility although I wouldn't expect that on a new computer.
For the first (too many concurrent tasks), check to see how many things are being started automatically when you boot, and check to see how many applications are being started by whoever's using the computer. In IE or Firefox each tab counts as a separate task which takes resources. A quick and easy way to check the automatically started tasks is to run MSCONFIG and click the Startup tab (Note: avoid the other tabs!) and look at the list. There you can uncheck anything except your antivirus (Defender, Avast, or whatever you're using).
A lot of new computers come loaded with what has been termed "bloatware" which most people find to be an unneeded nuisance. If you and your husband are sure you don't need one of these, you can uninstall it via the Programs and Features applet of the Control Panel. HP, Dell, and Toshiba are 3 I know firsthand that put these on new PCs. Some are helpful and others are not, so you have to be careful. Before removing anything, especially those related to your computer manufacturer, you want to be very cautious.
Above all I recommend you make a full system backup to an external hard drive so you can recover everything if need be. You should also read your user guide to find the procedure for restoring your computer to factory settings and be sure you have any discs needed for doing that.
Edited by wpgwpg, 06 July 2014 - 09:29 AM.