The problem with having a Windows PC that has only one hard drive is that it gets hard to find a program that's double the size of the other at the same time. For example, if you want to play a game like WoW and have an installed Windows XP PC, it will be hard to get both of the files you need to play the game because they are not the same size. To solve this problem, you can download a program called DoubleDesktop. It's a "jumping double-application" program that has more applications than it does files. You can easily double the size of your Windows PC while only downloading one application. As you can see, the good things about this application are more applications, more space and more storage space.
If you have heard of it, then you know there is a free version of this application that is much smaller than the "regular" version. So if you don't mind paying for it, you can try it out. As you probably know, any free program is going to have some strings attached. If you have a habit of installing things that you don't really need, then you may think twice about downloading a free program like this. Also, since it is a free application, you probably don't want to risk getting spyware or malware on your computer. So be careful when choosing which program to download.
Programs like this were designed by a computer programmer that is best known for building Internet browsers. This program is very popular because it offers many features including more files than what you have installed and more storage space. If you need to run more than one application at the same time, then you should try out this free program. If you don't mind paying a small fee, then the "regular" version of this application is a good alternative.