Insufficient Virtual Memory
You have huge chances of experiencing this problem if you have just installed an app that needs huge memory. When your RAM is too low, this problem might also take place. Unless your RAM is enough, you will have to buy more RAM chips. In case your RAM can still work, you only need to increase your pagefile size. First, go to Control Panel, click System followed by Security. Click on Advanced system settings, point your computer mouse to the Advanced tab and click Settings. Afterwards, increase your pagefile up to two times your memory.
Lost DLL Files
In order for some programs to run, certain files are needed. If these files went missing, this serves as the main reason why DLL files gets lost. One possible cause for this is the attack of virus. Installing a new and updated good antivirus will do well for you. Reinstallation of software which has been affected is your next choice in case the problem doesn’t have to do with viruses. If you just have to download, the most important thing to take into account is the reliability of your source. The rate of success that downloaded files have is not always 100% so failure can sometimes occur.