# QA40x Application 'Poof' v1.209 **URL:** \ **Category:** QA40x\ **Created:** [January 19, 2025, 9:57pm UTC](https://forum.quantasylum.com/t/qa40x-application-poof-v1-209/1691 "2025-01-19T21:57:18Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![beachside](https://avatars.discourse-cdn.com/v4/letter/b/a88e57/32.png) [@beachside](https://forum.quantasylum.com/u/beachside)\ **Post date:** [January 19, 2025, 9:57pm UTC](https://forum.quantasylum.com/t/qa40x-application-poof-v1-209/1691/1 "2025-01-19T21:57:18Z")
I now have two laptops where the splash screen comes up, but the application GUI is not shown. The QA403 device is detected by the PCs and shown in Device Manager. One laptop is Win 11 and the other is Win 10, so nothing common there. It works fine on every other PC I’ve tried. Have tried v1.202 but no difference. Have also tried running the app as admin with no difference either. Anyone have any ideas? Cheers ---
**Author:** ![matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@matt](https://forum.quantasylum.com/u/matt)\ **Post date:** [January 21, 2025, 4:30pm UTC](https://forum.quantasylum.com/t/qa40x-application-poof-v1-209/1691/2 "2025-01-21T16:30:38Z")
Hi @beachside, can you uninstall 1.209, and then install 1.202. But before you run it, go to the `MyDocs\QuantAsylum\QA40x` folder and rename that to ```QA40x_old``. And then run 1.202. Does it come up? ---
**Author:** ![rbenak](https://avatars.discourse-cdn.com/v4/letter/r/ad7895/32.png) [@rbenak](https://forum.quantasylum.com/u/rbenak)\ **Post date:** [January 21, 2025, 4:35pm UTC](https://forum.quantasylum.com/t/qa40x-application-poof-v1-209/1691/3 "2025-01-21T16:35:26Z")
@matt - same issue here MyDocs\QuantAsylum\QA40x\ contains NO entries to any of the log files MyComputer\EventViewer\ is non-conclusive as well following your instructions now and will post back shortly note: for clarity, using Windows Uninstall ![image](https://canada1.discourse-cdn.com/flex032/uploads/quantasylum/original/2X/9/992b2638462048f22af59811e2865ee734069bb3.jpeg) ---
**Author:** ![rbenak](https://avatars.discourse-cdn.com/v4/letter/r/ad7895/32.png) [@rbenak](https://forum.quantasylum.com/u/rbenak)\ **Post date:** [January 21, 2025, 4:46pm UTC](https://forum.quantasylum.com/t/qa40x-application-poof-v1-209/1691/4 "2025-01-21T16:46:16Z")
@matt - and, we have lift-off 1.202 starts up just fine without hardware attached also note: **1.208** starts up just fine as well ![image](https://canada1.discourse-cdn.com/flex032/uploads/quantasylum/original/2X/7/7cfaf59a34e1cf474a42b89a3b035c2c16bb5cbd.png) ---
**Author:** ![rbenak](https://avatars.discourse-cdn.com/v4/letter/r/ad7895/32.png) [@rbenak](https://forum.quantasylum.com/u/rbenak)\ **Post date:** [January 21, 2025, 4:47pm UTC](https://forum.quantasylum.com/t/qa40x-application-poof-v1-209/1691/5 "2025-01-21T16:47:11Z")
note: in both cases, the install was executed under the Admin context, and startup was prompted under the same Admin context I am happy to run a Trace against v1.209, if possible but I suspect that command line params will be needed let me know how I can help **UPDATE** for command line params: \QA40x\>QA40x.exe -H **UPDATE** : and just like that, 1.209 now starts up prob a missing library that 1.209 requires and previous versions install? ![image](https://canada1.discourse-cdn.com/flex032/uploads/quantasylum/original/2X/e/e74b515255fba2b847b067ff2b985b5406ebea00.png) should prob update runtime labels and such - toolbar prompts for connecting to the QA402 ---
**Author:** ![beachside](https://avatars.discourse-cdn.com/v4/letter/b/a88e57/32.png) [@beachside](https://forum.quantasylum.com/u/beachside)\ **Post date:** [January 21, 2025, 8:55pm UTC](https://forum.quantasylum.com/t/qa40x-application-poof-v1-209/1691/6 "2025-01-21T20:55:42Z")
Hi Matt. Thanks but that didn’t fix it for me. I tried uninstall and rename on both versions. ---
**Author:** ![matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@matt](https://forum.quantasylum.com/u/matt)\ **Post date:** [January 21, 2025, 10:33pm UTC](https://forum.quantasylum.com/t/qa40x-application-poof-v1-209/1691/7 "2025-01-21T22:33:35Z")
Hi @beachside, so let’s focus on the Win10/Win11 machines that aren’t working. Can you please reboot the machine (to make sure there’s not a zombie remnant of QA40x.exe still running). And then uninstall whatever QA40x you have installed. Then go to the `c:\program files (x86)\QuantAsylum\Qa40x` and manually delete that folder. Then go to `MyDocs\QuantAsylum\Qa40x` and delete that folder. Reboot. Then install [1.202](https://github.com/QuantAsylum/QA40x/releases/tag/1.202) without the QA40x hardware attached and see if that comes up. Please report back when time permits! ---
**Author:** ![beachside](https://avatars.discourse-cdn.com/v4/letter/b/a88e57/32.png) [@beachside](https://forum.quantasylum.com/u/beachside)\ **Post date:** [January 22, 2025, 8:07am UTC](https://forum.quantasylum.com/t/qa40x-application-poof-v1-209/1691/8 "2025-01-22T08:07:30Z")
Thanks for your help Matt. I have fixed the Win 10 one with a deinstall and reinstall of 1202, then 1209. But I now think the Win 11 one is some kind of hidden (no error etc) rights issue, as it’s a corporate laptop and I have most admin rights, but not 100% full admin rights. (I have it working fine on two other Win 11 PCs.) Thanks again. Love the QA!