Game client functions but game window is broken

[Nightbringer Tenchi.5794]

After a hard freeze yesterday while in WvW, I restarted the client and it functioned normally until the game window opened. the window opens, freezes for 1-2 seconds than minimizes and doesn't function properly. when previewing the window from the task bar it shows a pixel thin line, when attempting to alt tab into the window it shows the top bar of the window but not the game window, making the game unplayable. Task manager says the game client and window are functioning(responding), client repair and reinstall didn't fix the issue, pc restart, running as admin, registry scan, compatibility troubleshooter and sfc scan didn't find or fix the issue either.

As listed in the Arenanet.txt file:--> Crash <--Assertion: m_state == MOUNT_STATE_INITIALIZED_NEEDS_PATCHING || m_state == MOUNT_STATE_PATCHEDFile: ......\Services\Asset\MultiArchive\MultiManifest.cpp(808)App: Gw2-64.exePid: 7128Cmdline: -allowInstallBaseAddr: 00007FF6A8B70000ProgramId: 101Build: 68886When: 2016-11-08T14:28:52Z 2016-11-08T06:28:52-08:00Uptime: 0 days 4:00:42Flags: 0

--> Crash <--Exception: c0000005
Memory at address 00000000`00000008 could not be readApp: Gw2-64.exePid: 344Cmdline:BaseAddr: 00007FF6AC5B0000ProgramId: 101Build: 69799Module: d3d9.dllWhen: 2016-12-10T21:50:44Z 2016-12-10T16:50:44-05:00Uptime: 0 days 0:09:29Flags: 0

--> Crash <--Exception: c0000005
Memory at address 00000180`b8658690 could not be writtenApp: Gw2-64.exePid: 4928Cmdline:BaseAddr: 00007FF753E50000ProgramId: 101Build: 71559When: 2017-01-24T20:27:39Z 2017-01-24T15:27:39-05:00Uptime: 0 days 0:00:29Flags: 0

[mercury ranique.2170]

Trying running the game with the -prefreset commandline argument. This resets your personal settings. Most likely the crash set the game to an unplayable mode. More info about command line arguments and how to use them can be found here: https://wiki.guildwars2.com/wiki/Command_line_arguments

[Nightbringer Tenchi.5794]

-prefreset Worked. Thanks Mercury Ranique.