Visual Studio 2017 RC install error 0x80131500 Failed to deserialize packages -

i'm trying install new visual studio 2017 rc on 1 on machines. first attempt failed during download because of not enough free disc space. after each try of install again results in following error/excpetion:

2016-11-17t16:50:08 : error : failed installed product summaries. [installerid: setupengine, error: jsonreaderexception @    bei newtonsoft.json.jsontextreader.readstringintobuffer(char quote)     bei newtonsoft.json.jsontextreader.parsestring(char quote, readtype readtype)    bei newtonsoft.json.jsontextreader.readstringvalue(readtype readtype)    bei newtonsoft.json.jsontextreader.readasstring()    bei newtonsoft.json.serialization.jsonserializerinternalreader.readfortype(jsonreader reader, jsoncontract contract, boolean hasconverter)    bei newtonsoft.json.serialization.jsonserializerinternalreader.populateobject(object newobject, jsonreader reader, jsonobjectcontract contract, jsonproperty member, string id)    bei newtonsoft.json.serialization.jsonserializerinternalreader.createobject(jsonreader reader, type objecttype, jsoncontract contract, jsonproperty member, jsoncontainercontract containercontract, jsonproperty containermember, object existingvalue)    bei newtonsoft.json.serialization.jsonserializerinternalreader.populatelist(ilist list, jsonreader reader, jsonarraycontract contract, jsonproperty containerproperty, string id)    bei newtonsoft.json.serialization.jsonserializerinternalreader.createlist(jsonreader reader, type objecttype, jsoncontract contract, jsonproperty member, object existingvalue, string id)    bei newtonsoft.json.serialization.jsonserializerinternalreader.setpropertyvalue(jsonproperty property, jsonconverter propertyconverter, jsoncontainercontract containercontract, jsonproperty containerproperty, jsonreader reader, object target)    bei newtonsoft.json.serialization.jsonserializerinternalreader.populateobject(object newobject, jsonreader reader, jsonobjectcontract contract, jsonproperty member, string id)    bei newtonsoft.json.serialization.jsonserializerinternalreader.createobject(jsonreader reader, type objecttype, jsoncontract contract, jsonproperty member, jsoncontainercontract containercontract, jsonproperty containermember, object existingvalue)    bei newtonsoft.json.serialization.jsonserializerinternalreader.deserialize(jsonreader reader, type objecttype, boolean checkadditionalcontent)    bei newtonsoft.json.jsonserializer.deserializeinternal(jsonreader reader, type objecttype)    bei newtonsoft.json.jsonserializer.deserialize[t](jsonreader reader)    bei microsoft.visualstudio.setup.serialization.modelserializer`1.deserialize(textreader reader)    bei microsoft.visualstudio.setup.cache.instancerepository.getinstance()    bei microsoft.visualstudio.setup.cache.cacherepository.<getinstances>d__25.movenext()    bei microsoft.visualstudio.setup.installedproductsproviderservice.getinstalledproductsummariesimpl()    bei microsoft.visualstudio.setup.installedproductsproviderservice.getinstalledproductsummaries()] 

i tried:

• download , run installer again
• manual delete c:\program files (x86)\microsoft visual studio*
• removed new installed components (core framework, win sdk etc.)
• uninstalled visual studio 15 preview

i assume somehow installer can't information products installed. 1 line before excpetion:

2016-11-17t16:50:08 : verbose : getting product summaries. [installerid: setupengine] 

i know failed visual studio installations messed os reinstall solves problem. before maybe has solution or hint - "just" json parsing problem ...

orginal solution: https://developercommunity.visualstudio.com/content/problem/2877/install-error-0x80131500-failed-to-deserialize-pac.html

the file mentioned elliot cooley (state.json) found under

%programdata%\microsoft\visualstudio\packages_instances\<instance> "instance" 8 character hex string. 

was problem. json parsing error obvious. renamed/deleted file , setup works charm.