Mochabomb

I recently had trouble after installing Panda Platinum Antivirus on my Apache webserver - any files that got downloaded were cut off at 128Kb.

The solution is here

Quote:
If you encounter problems running Apache 2 under Windows, such as corrupted or incomplete file downloads, unexplained error messages, or a conflict with a software firewall, please place the following directives in httpd.conf to see if they eliminate the issue:

EnableSendfile Off
EnableMMAP Off
Win32DisableAcceptEx

The general problem is that many people install various add-ons to windows (such as software firewalls, virus checkers, etc) that break some of the advanced functionality that Apache uses to speed the sending of files. The above directives turn off the advanced functionality and make Apache fall back to more basic (but slower) techniques

EndQuote

These directives fixed the problem once apache was stopped, then started up again.