Where's my Internet Explorer gone?

[Southpaw]

Try a system restore to a date before you downloaded it, it should change your PC back to how it was on that date, ( I had to do this rather a lot in my early years with PCs many years ago );
http://windows.microsoft.com/en-GB/windo...em-restore
If any bad things have been installed with your download then you can get rid of them using Malwarebytes free version;http://www.malwarebytes.org/lp/lp4_r/?utm_source=bing&utm_medium=cpc&utm_campaign=search-brand-uk&utm_term=malwarebytes%20free&utm_content=cR8a3W9D|pcrid|4362383745|pkw|malwarebytes%20free|pmt|be|pdv|c|
If that doe`s not work you can try to repair your Windows installation by running the command sfc /scannow, note that there is a space between the c and the /
http://pcsupport.about.com/od/toolsofthe...cannow.htm
Then download Gimp from the official site after un-ticking any extras;
http://www.gimp.org/
Best of luck with it, regards, Bob.