I have a Logitech Wireless Headset H760 and I have an rather...unique issue that I have no clue how to confirm or fix.
On either my desktop (wireless) or laptop, when I plug the receiver dongle into the USB port, my wireless connection for that computer chugs to a near stand still. This recently started and I don't know why or how.
If you need specifications on my laptop (which is priority btw) they are:
Toshiba Satellite A355 (2008)
CPU: Core 2 Duo T6400 @2.0Ghz 2.0Ghz
RAM: 4GB 400Mhz SDRAM (2x2GB)
Motherboard: Toshiba KTKAA R1
Northbridge: Intel GM45/GM47 R7
Southbridge: Intel 82891IM (ICH9-M) R7
Wired Adapter: Realtek RTL8102E Family PCI-E Fast Ethernet NIC (NDIS 6.0)
Wireless Adapter Intel Wireless WiFi Link 5100
Video: Mobile Intel 4 Series Express Chipset Family
Default Audio: Realtek Generic Audio Device (Harmon/Kardon Speakers)
USB Audio: Logitech Wireless Headset H760
I don't know if you solved your problem - I am looking for the Windows XP drivers for this headset myself.
But I noticed in my research that Logitech has said the USB receiver for the H760 can "conflict" with other wireless devices.
Logitech recommends placing this receiver as FAR AWAY from those other devices as possible.
Hope that helps!