Here we go> on XP> BOINC 5.10.30 runs fine but; it doesn’t show up in task manager after running approximately 20 Mins but it is still crunching the icon freezes in the tray you may ask how I know it is still crunching easy the CPU temp remains the same and it shows in Processes, so I have to reinstall then repair> it then works fine again for approximately 20 Mins? Now why I repair is simple I have to update/exit or whatever. I have checked everything, nothing been installed no new hardware nothing?
I have done all what they say only difference is mine dont greyout it just sits there staring at me It don`t say nothing to me it has me really baffled
Viv - I'm afraid I can't help in any way at all - I have 5.10.30 installed on all my XP machines and have never had a problem, and certainly not one like yours.
I would imagine in must be specific to your machine and a clash somewhere perhaps with some software, but its just a stab in the dark
Maybe try the latest beta version 5.10.39 or roll back to one of the older versions that worked for you in the past available HERE.
I know there's not much use in me posting this, but didn't want you to think this was being ignored 
only difference is mine dont grey out it just sits there staring at me It don`t say nothing to me 
it has me really baffled
