I had no problem Downloading Hi Suite and installing on my comp. Vista Business SP2 OS. When I connected my phone (U8150) all went smooth as.
My problem was that HI Suite opened at Startup of comp and even though it was not checked (Tools > Settings > Launch at Startup).
Huawei could not help/understand and through another Forum, I found that a Program called Autoruns enabled me to stop Hi Suite from starting Automatically.
I didn't have any worries about Drivers as Vista & Windows7 will have them available.
I've used Hi Suite to install Astro File Manager and Swype to the phone - sweet as. Cheers Neil.