# FB8 Hangs on startup
**URL:** https://www.finalbuilder.com/forums/t/fb8-hangs-on-startup/6556
**Category:** Bugs
**Created:** [August 22, 2019, 9:17pm UTC](https://www.finalbuilder.com/forums/t/fb8-hangs-on-startup/6556 "2019-08-22T21:17:14Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@cdaniel](https://www.finalbuilder.com/forums/u/cdaniel)
#### Post date: [August 22, 2019, 9:17pm UTC](https://www.finalbuilder.com/forums/t/fb8-hangs-on-startup/6556/1 "2019-08-22T21:17:14Z")
I just upgraded to FB8, long time user of FB6.
I’m experimenting with upgrading my FB6 projects, so far, mostly going well. I work on several different computers (just me - solo developer). On my main desktop machine (Windows 10 1903), FB8 works perfectly, but on a secondary machine (Server 2016), FB8 hangs in what appears to be a single-thread compute bound loop (25% CPU on a 4-way machine). The hand occurs somewhere during the start process where are FB modules are enumerated. If I kill the process and try again, it inevitably hangs, but always in a different spot.
How can I proceed?
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### Author:  [@Vincent](https://www.finalbuilder.com/forums/u/Vincent)
#### Post date: [August 22, 2019, 10:17pm UTC](https://www.finalbuilder.com/forums/t/fb8-hangs-on-startup/6556/2 "2019-08-22T22:17:09Z")
I’ve not seen this before, but I would try uninstalling FB8 and re-installing. Another option is to try rebooting… I know, cliche IT response but still worth a try.
We have FB8 running on several server 2016 machines (physical and virtual) so we know it’s compatible.
Also, have a look in your %TEMP% folder and see if there is a finalbuilderbugreport.txt file.
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### Author:  [@cdaniel](https://www.finalbuilder.com/forums/u/cdaniel)
#### Post date: [August 22, 2019, 10:36pm UTC](https://www.finalbuilder.com/forums/t/fb8-hangs-on-startup/6556/3 "2019-08-22T22:36:28Z")
I’ll take a look and see what I can find. I’m suspicious of this machine for other reasons, too, so I won’t be at all surprised if it’s something environmental.
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### Author:  [@cdaniel](https://www.finalbuilder.com/forums/u/cdaniel)
#### Post date: [August 22, 2019, 10:48pm UTC](https://www.finalbuilder.com/forums/t/fb8-hangs-on-startup/6556/4 "2019-08-22T22:48:23Z")
Very odd. I did
- Uninstall
- Reboot
- Re-install
- Run - still got stuck
- Launched VS 2019 and attached to FinalBuilder.exe - attach failed (I think) because of 100% CPU bound thread.
- Quit VS2019 and sitting behind it, FB8 is now running!
- Quit FB8 and launched again - now it doesn’t get stuck, but it complains that a whole bunch of plugins are loaded twice
- When into package manager, deselected everything, re-selected everything
- Quit and re-launch
- Now FB8 seems perfectly happy
I know I’d downloaded an older FB8 build (last year), but I don’t recall if I ever installed it, so this might’ve been an upgrade install from a much older build, which the uninstall/reinstall might’ve helped clean up?
Whatever - seems to be working now. I’m still suspicious of this machine, but FB8 is doing it’s thing now, so I can move forward.
Thanks!
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### Author:  [@Vincent](https://www.finalbuilder.com/forums/u/Vincent)
#### Post date: [August 22, 2019, 11:07pm UTC](https://www.finalbuilder.com/forums/t/fb8-hangs-on-startup/6556/5 "2019-08-22T23:07:12Z")
I think this was caused by a regression bug in 8.0.0.2548 that was fixed in 8.0.0.2550 - what version are you using?
- Bug Fix - Fixed regression with package loading which caused some package to not be loaded.