Tiny BitTorrent client without installation.
Download Portable uTorrent Online (0.5 MB) 02/04/16
Select version and enter language build: 37951 (skip if you need only english or have yet this build)
To use Player or VirusGuard you need μTorrentPRO Pack (14 MB) 02/04/16
No virus definition: run update
Extract and run uTorrentPortable.
Settings of installed uTorrent should be preserved.