I had this issue with both my client and the login server for my browser (chrome). The repair tool seemed to fix the issue for my client but I'm still having issues logging in to send a support ticket. The only reason I'm able to post here is because it's kept me logged in.
Things were fine yesterday and between then and now my PC's received a windows update. That's when my issues started.
Any advice or help would be greatly appreciated.
Edit: To add, I've also tried logging in on Firefox and Edge with no success either.
***Welcome to Technical Support!***
Need tech support? Look no further! Our technical wizards such as the [Wrenchmen](http://boards.euw.leagueoflegends.com/en/c/help-support-en/EXtUdIss-the-wrenchmen-helping-solve-issues-one-post-at-a-time) and other community members, are here to help!
We've got the handy [Wrenchmen's Toolbox](https://boards.euw.leagueoflegends.com/en/c/help-support-en/hlYp1Qn8-common-fixes-answers-the-wrenchmens-toolbox) with a plethora of guides and fixes that may already answer your question, but if not - post away!
Keep in mind the boards are for player interactions - if you need further support, or it requires Riot investigation, you’ll still want to [Submit a Ticket](https://support.riotgames.com/hc/en-us/requests/new) to Player Support the old-fashioned way:
- Billing issues
- Suspension appeals
- [Account Recovery](https://boards.euw.leagueoflegends.com/en/c/help-support-en/hPvMFBIN-how-to-recover-your-account-keep-it-safe)
- Advanced tech support (no answer on boards? No problem!)
If you wish to report a bug, please use the [Bug Reports Section](http://boards.euw.leagueoflegends.com/en/c/bug-reports-eu)
If you have questions about a ban or player behaviour, please use the [Player Behaviour Section](https://boards.euw.leagueoflegends.com/en/c/player-behaviour-en)
Follow the **[Universal Rules](http://boards.euw.leagueoflegends.com/en/c/announcements-en/3eWpXbJi)** and keep content focused on appropriate topics for these Boards.
Use the report button for any post you think deserves the attention of our moderators.