Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))

So when playing with SharePoint 2010 using claims based authentication of cource sometimes I would see the above error. It really didn’t make much sense. I was doing everything as administrator and I could do the same thing from the administration website, but not powershell.

for instance

$snapin = Get-PSSnapin | where {$_.name -eq 'Microsoft.SharePoint.PowerShell'}
if($snapin -eq $null){ Add-PSSnapin Microsoft.SharePoint.PowerShell }
$webappurl = 'someweb.domain.com'
$spsite = get-spsite "https://$webappurl"
$spweb = get-SPWeb -site $spsite
Get-SPWeb : Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
At line:1 char:19
+ $spweb = get-SPWeb <<<<  -site $spsite
    + CategoryInfo          : InvalidData: (Microsoft.Share....SPCmdletGetWeb:SPCmdletGetWeb) [Get-SPWeb], Unauthorize   dAccessException
    + FullyQualifiedErrorId : Microsoft.SharePoint.PowerShell.SPCmdletGetWeb

Well, not sure if this is a “prober” solution, but this worked for me.
Open Central Administration –> Security –> Configure managed accounts
Make sure the user that gets above error is registered.

Open Central Administration –> Security –> Configure service accounts
Select Farm Account –> Select the account from the dropdown menu and click OK