I'm having major issues with the July 2017 release. I have tried the following suggestions:
https://powerbi.microsoft.com/en-us/documentation/powerbi-desktop-error-launching-desktop/
And this one I found somewhere:
a. Start Command Prompt as an administrator by right-clicking it and selecting "Run as administrator."
b. Enter the this command to reset the network adapter: "netsh winsock reset" without the quotation marks and hit Enter.
c. Restart the computer.
None of them work.
Then I created a fresh install of a virtual WIndows 10 64 bit (1703). Here I installed the July Power BI Desktop and got the same error
Above sugestions of resetting winsock and running as Adminstrator does not make anything better 
Additionally I find some error entries in the Application Log when trying to Launch it.
Additionally i get an entry in a kernel Windows eventlog. I insert this saved as JSON as Code below:
[
{
"MachineName": "Win10-PowerBI",
"Data": [
],
"Index": 407,
"Category": "(289)",
"CategoryNumber": 289,
"EventID": 18939929,
"EntryType": 1,
"Message": "The description for Event ID \u0027-1054801895\u0027 in Source \u0027MSOLAP$AnalysisServicesWorkspace1572025109\u0027 cannot be found. The local computer may not have the necessary registry information or message DLL files to display the message, or you may not have permission to access them. The following information is part of the event:\u0027msmdsrvi.rll\u0027, \u00278192\u0027",
"Source": "MSOLAP$AnalysisServicesWorkspace1572025109",
"ReplacementStrings": [
"msmdsrvi.rll",
"8192"
],
"InstanceId": 3240165401,
"TimeGenerated": "\/Date(1499357611000)\/",
"TimeWritten": "\/Date(1499357611000)\/",
"UserName": null,
"Site": null,
"Container": null
},
{
"MachineName": "Win10-PowerBI",
"Data": [
],
"Index": 406,
"Category": "(289)",
"CategoryNumber": 289,
"EventID": 18939929,
"EntryType": 1,
"Message": "The description for Event ID \u0027-1054801895\u0027 in Source \u0027MSOLAP$AnalysisServicesWorkspace1572025109\u0027 cannot be found. The local computer may not have the necessary registry information or message DLL files to display the message, or you may not have permission to access them. The following information is part of the event:\u0027msmdsrvi.rll\u0027, \u00278192\u0027",
"Source": "MSOLAP$AnalysisServicesWorkspace1572025109",
"ReplacementStrings": [
"msmdsrvi.rll",
"8192"
],
"InstanceId": 3240165401,
"TimeGenerated": "\/Date(1499357611000)\/",
"TimeWritten": "\/Date(1499357611000)\/",
"UserName": null,
"Site": null,
"Container": null
},
{
"MachineName": "Win10-PowerBI",
"Data": [
],
"Index": 399,
"Category": "(294)",
"CategoryNumber": 294,
"EventID": 19267595,
"EntryType": 1,
"Message": "The description for Event ID \u0027-1054474229\u0027 in Source \u0027MSOLAP$AnalysisServicesWorkspace1572025109\u0027 cannot be found. The local computer may not have the necessary registry information or message DLL files to display the message, or you may not have permission to access them. The following information is part of the event:\u0027\u0027",
"Source": "MSOLAP$AnalysisServicesWorkspace1572025109",
"ReplacementStrings": [
""
],
"InstanceId": 3240493067,
"TimeGenerated": "\/Date(1499357607000)\/",
"TimeWritten": "\/Date(1499357607000)\/",
"UserName": null,
"Site": null,
"Container": null
},
{
"Id": 2,
"Version": 0,
"Qualifiers": null,
"Level": 2,
"Task": 2,
"Opcode": 12,
"Keywords": -9223372036854775792,
"RecordId": 3,
"ProviderName": "Microsoft-Windows-Kernel-EventTracing",
"ProviderId": "b675ec37-bdb6-4648-bc92-f3fdc74d3ca2",
"LogName": "Microsoft-Windows-Kernel-EventTracing/Admin",
"ProcessId": 4476,
"ThreadId": 2764,
"MachineName": "Win10-PowerBI",
"UserId": {
"BinaryLength": 28,
"AccountDomainSid": "S-1-5-21-2575896698-3351476891-589229321",
"Value": "S-1-5-21-2575896698-3351476891-589229321-1001"
},
"TimeCreated": "\/Date(1499356849523)\/",
"ActivityId": null,
"RelatedActivityId": null,
"ContainerLog": "microsoft-windows-kernel-eventtracing/admin",
"MatchedQueryIds": [
],
"Bookmark": {
},
"LevelDisplayName": "Error",
"OpcodeDisplayName": "Start",
"TaskDisplayName": "Session",
"KeywordsDisplayNames": [
"Session"
],
"Properties": [
"System.Diagnostics.Eventing.Reader.EventProperty",
"System.Diagnostics.Eventing.Reader.EventProperty",
"System.Diagnostics.Eventing.Reader.EventProperty",
"System.Diagnostics.Eventing.Reader.EventProperty"
],
"Message": "Session \"MEngineTraceReaderSession\" failed to start with the following error: 0xC0000035"
}
]
The 10 digit number after MSOLAP$AnalysisServicesWorkspace in the events seems to change for every try 😞
Is there any way to enable error logging by startup switch or so. IIt is impossible to enable Trace as it requires the ability to launch the application.
Uninstalling the July 2017 version and installing the June 2017. Gives a nice and functional Power BI Desktop 
, but with new features missing 
I'm also having the same issue. I just installed the August update for 2016. Below is a copy of my error.
