Conflicting Software

Most common indicators of conflicting software are errors like "Access is denied", "Permission denied" or java.io.FileNotFoundException mentioning the file that is present and is writable by the user the agent/build runs under.
Also, certain software running in background (like antiviruses) can significantly slow down build agent operations like sources checkout, artifact publishing or even build running.

Certain antivirus software like Kaspersky Internet Security can result in Java process crashes or other misbehavior like inability to access files. Please try running with antivirus software uninstalled before reporting the issue to JetBrains. e.g. see the issue.
ESET antivirus can also slow down Ant/IntelliJ IDEA project builds a great deal (slowing down TCP connections to localhost on agent).

Please disable various indexing services. e.g. there might be problems with Windows Indexing Service. See issue for more details. Windows System Restore Feature might also need disabling.

Please also do not install software with background indexing like WinCVS, TortoiseCVS, TortoiseSVN and other Tortoise* products. This applies to server and also to agents if you use agent-side checkout.

Skype software is known to:
1. use port 80 on the system so you might not be able to use TeamCity server using default 80 port.
2. corrupt layout of pages displayed in Internet Explorer. Internet Explorer Skype plugin is to blame. (TW-13052).