SharePoint Central Admin and other Site Collection Not Loading

Hi everyone,

For some reason this morning, Central Administration will not load...the browser will spin and spin, but not error out. I also have another site collection doing the same thing...spin and spin. I have a large intranet site collection that seems to be operating fine at the moment.

Now, when I do: Get-SPServiceInstance | Where-Object {$_.TypeName -eq 'Central Administration'}

I Get this:

TypeName                         Status   Id
        --------                         ------   --
Central Administration           Provi... 7aa067e2-6aef-4c7c-948a-7309f9287c6e

Then, if I run:

Get-SPServiceInstance | Where-Object {$_.Id -eq `7aa067e2-6aef-4c7c-948a-7309f9287c6e'} | Start-SPServiceInstance"

I get this response:

Start-SPServiceInstance : An object of the type Microsoft.SharePoint.Administra
tion.SPServiceInstanceJobDefinition named "job-service-instance-7aa067e2-6aef-4
c7c-948a-7309f9287c6e" already exists under the parent Microsoft.SharePoint.Adm
inistration.SPTimerService named "SPTimerV4".  Rename your object or delete the
 existing object.
At line:1 char:114
+ Get-SPServiceInstance | Where-Object {$_.Id -eq `7aa067e2-6aef-4c7c-948a-7309
f9287c6e'} | Start-SPServiceInstance <<<<
    + CategoryInfo          : InvalidData: (Microsoft.Share...ServiceInstance:
   SPCmdletStartServiceInstance) [Start-SPServiceInstance], SPDuplicateObject
  Exception
    + FullyQualifiedErrorId : Microsoft.SharePoint.PowerShell.SPCmdletStartSer
   viceInstance

I've checked my service accounts, and they are working. I've restarted services and the SP server itself, with no resolution. There haven't been any updates applied since 6/12 (working since) and the server has the same settings for months now...any ideas or what to try? This is production so I can't do anything drastic..

Looking through the event logs, there aren't any errors or warnings that seem relevant to this issue at all.

Thanks!