No matter what compiler I elect to use (I have tried codeblocks, bloodshed dev C++, visual studio c++ express 2005, visual studio 2008 & 2010 and eclipe [java]) when i attempt to rebuild a project after executing it once, it will link and compile, but and error will appear stating that the compiler could not open the executable to re-write it. I have already attempted the following: ** I have no Antivirus running (windows has a warning stating it). ** I have no firewall running (windows also has a warning about it). ** I have checked process explorer and no Antivirus or firewall is running. ** I have checked process explorer and no other process is attempting to use that executable. (the program terminates from process explorer at the same time it stops running in command prompt) ** I have followed all necessary instruction to make sure cygwin was removed from my computer. ** My program will compile & run without any errors (it does this to any code i try to compile, even hello world [so it isn't a coding error] **doubt its a compiler error because it happens with c++ and java [same problem from command line too). ** doubt its an ide problem as this happens with multiple ide I am going to take a guess and say I either a have a rogue av or firewall (*cough* Windows Defender *cough*) issue that I can not seem to track down and shut down or windows keeps accessing the project directory (process explorer did show a process name "system" was accessing that project directory). **Yes I am the admin for the computer, and the only account on it. Any assistance is much appreciated, I really don't want to dual boot linux just to develop programs.